(57) The invention relates to a device for measuring a transversal section (4) of a longitudinally-laid
body (5) translating in a longitudinal direction. Two first rigid and straight support
elements (13, 14) lie and intersect on a measuring plane (6), each of which support
elements (13, 14) bears on a longitudinal side facing the body (5) a plurality (15,
16) of light sources (17, 18) aligned along longitudinal axes (11, 12) of the support
elements (13, 14) and each emits a light beam (19) in a direction lying on the measuring
plane (6) and perpendicular to the axes (11, 12) of the support elements (13, 14).
Successive single light beams (19) are emitted in a perpendicular direction by each
light source (17, 18) according to a sequence corresponding to an alignment of the
light sources (17, 18). Two second support elements (23, 24) lie on the measuring
plane (6) of the transversal section (4), each of which second support elements (23,
24) bears a plurality (25, 26) of light sensors (27, 28) picking up the light beam
(19) emitted from each of the light sources (17, 18), according to a real configuration
of the transversal section (4) to be measured as well as to the position of the plurality
of sensors (27, 28) with respect to the light sources (17, 18). The device further
comprises an auxiliary measuring system (3) acting on the measuring plane (6).
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